250

Focal max (mm)

250

Focus min (cm)

0

Aperture max

5.5

Aperture min

5.5

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Right now it has just a tube that luckily fits within a t-mount, and combined with an extension tube, it works fine on the Pentax. This is definitely a Piesker, as these are known to have been sold in the US under a distributors Tele-Astranar label.